{"affected":[{"defaultStatus":"unaffected","ecosystem":"golang","packageName":"code.vikunja.io/api","product":"vikunja","source":"CNA: VulnCheck","vendor":"go-vikunja","versions":[{"lessThan":"2.7.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.7.1","versionType":"semver"}]}],"cveId":"CVE-2026-123523","cwes":["CWE-770"],"description":"Vikunja before 2.7.1 contains an uncontrolled resource consumption vulnerability that allows authenticated users to exhaust server memory by requesting avatars at many distinct sizes. Attackers can upload a noisy avatar and fetch it at each size up to 1024, caching roughly a gigabyte per account without eviction and causing the API process to be OOM-killed.","epss":{"date":"2026-11-12","percentile":0.23777,"score":0.00307},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-3x3m-2j93-w46j"}],"kev":null,"metrics":[{"score":7.1,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":6.5,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},{"score":7.1,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":6.5,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794492214788,"publishedAt":1794101853144,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-3x3m-2j93-w46j"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/vikunja-before-2.7.1-memory-exhaustion-via-unbounded-avatar-size-cache"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-3x3m-2j93-w46j"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-3x3m-2j93-w46j"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/vikunja-before-2.7.1-memory-exhaustion-via-unbounded-avatar-size-cache"}],"remediation":[],"revision":"688126a00bcc12c96a47b0a0534c6ac35dcb7c8d6b58d0d4fd720a83271dc480","sources":[{"modifiedAt":1794492214788,"name":"CNA: VulnCheck","retrievedAt":1794496262521,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123523"},{"modifiedAt":1794104201907,"name":"NVD","retrievedAt":1794118568565,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123523"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794496293776,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123523"}],"ssvc":{"assessedAt":1794492189361,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache","updatedAt":1794496293776}